Dust collector for inclosed brake



July 25, 1933. PAYNE 1,919,343

DUST COLLECTOR FOR INCLOSED BRAKE Filed March 19, 1931 2 Sheets-Sheet l July 25, 1933. PAYNE 1,919,343

DUST COLLECTOR FOR INCLOSED BRAKE Filed March 19, 1931 2 Sheets-Sheet 2 Patented July- 25, 1933 v i I I UNITEDQST ATES PATENT OFFICE. I l rRANx EQPA YN I l, orcrrroaeqrnnrnors l I 'nus'r COLLECTOR non IncLosnn BR KE" hpplication filed llarch 19, 1931; Serial No. 523,723.

Myinvention relates to dust collectorsi for, flap valve structure which permits 'free dis brakes of the inclosed type and is concerned charge of particles "externally of the brake, generally with providing an arrangement but prevents any movement ofparticles, acfor evacuating dust, brake band fragments, companled by pressure, intothe interior of 5 and debris in general from theinterior of the brake. I

"the brake drum. u Fig. tis a view: similar to Fig.1, but i171 One object of my invention is todevise a lustrating a three-shoe, ,inclosed brakew'ith collecting means which ismounted permaany improved collector attachedthereto.

nently onjthe brake and which projects with- Fig.1 5 is a section along the line 5.5 in I in the brake drum for contact with or close Fig. 1-, illustrating the angular disposition 6 approach to the flanged periphery thereof, of the. collecting means'to the brake drum particles accumulating in the drum being flange. thrown outwardly by centrifugal force Referring to Figs. 1, 2, and 5 f th d H against the drum flange and deflected outlngs', the numeral designates a brake wardly of the drum by the collecting means. drum of theusual character Which is mounting a modified arrangement employing: a of which is attached: to "the tube'1'5 andthe Aiurther object is to provide an arranger ed for rotation in any desired manner. and ment for evacuating free particles fro1n the-.Wh1ch 1s 1110103 1 bythe customary cover interior of an inclosed brake whenever plate 11. 'Within the drum 10 is dis- 1 formed therein, preventing their being emposed the brake shoes 12 bearing the 0 bedded in the working surfaceson the brake ill ctlOIl' strips 13 and "which are arranged 0 shoe faces and causing squeaky and noisy, be. moved into braking position b the brakes, the device being further constructed Spreading means and-to be retracted by.

to prevent the entrance therethrough' into a spring The precise construction of the brake'of mud, sand, etc, from whatever he'braklng mechanism per se iorms no part cause. i a f the present invention, for howeverthe A further object is to devise a collector Same S nstru t d and arranged, my imof the character described which is readily proved dust collector will be positioned adaptable to inclosed brakes of all types, hln hqlnterlor 0f thedrum'and capaciregardless of the number of shoes',*and whose ilted to dlscharge free particles outwardly O attachment'to the brake may: be accomt f plished without requiring major changes in the W typ 'brake shown in the brake proper. f i I Fig. 1, the collecting means 1s preferably These and further objects of my invention b p-3 j n he lower portion of "the 111 b t f 1 i th f ll i ifi drum between the ad acent ends of the brake 35 tion, reference being had to the accompany.- h 6 pecifically, 1tcons1sts of a tube 15, ing drawings and the novel means by. which 0116 end i i h v m unted in the cover, I said objects are efiectuated Will be definitely P 11 Wlilh the np Portloll thereOf' X- i t d t i -th l i y i .1 tending across the width of the drum flange.

In the drawings; i i 1 the tube lIlCllIlGd' t0 Figure 1 is a sectional elevation o fan in- X 0f h nnasshovvn clearly in Fig. 5,

closed brake having two shoesand illustrata P p Q l P Q and he ing diagrammatically the application of my Q 9 sald e maybe l g tly re i r d d t ll t th t 1 duced 1n diameter as'at 16,to rece1veonfthe Fi 9, i ti l -th 1i 2 ;2 i extreme outer end thereof a receptacle 17,

4 Fi 1 1 king in the direction of the arshown in the present instance as'taking the Q rows and showing one method of collecting form of a bag, and which is secured on the the particles which are discharged exterend-of the tube by any"convenient form of i r. ,nally of the brake. I i clamp 18. Withinthe-drum 10, the tube i Fig. 3 is a view. similar to Fig. 2, but'showcarries a. curved deflector. plate .19;.:one' end 00 other end of which preferably rides lightly and yieldingly against the flange portion of the drum. As viewed in cross section in l, the tube 15 and deflector 19 constitute generally a spiral formation with entrance into the interior of the tube 15 being effected through the slot-2O which is cut into the wall of thetubc 15 adjacent the deflector19. The deflector 19 may be formed of any suitable material, whether of a metallic or non-metallic nature, and it is considered to be withdrum 10 is rotatin it will be obvious that free particles which areformed in the interior of the drum, whether due to the entrance of dust into the drum around the periphery of the cover plate, ground particles "from the material composing the drum, or fragments from the brake strips 13, the same will be thrown outwardly by centrifugal force toward the flange of the brake drum and will be eventually picked up by the deflector 19 for discharge outwardly of the drum through the tube 15 into the bag 17. In the rotation of'thedrum 10, these free particles substantially ride around withthe flange of the drum and the momentum thus imparted to them is availed of as a discharging forceby the inclination of the tube 15 shown. in Fig. 5, the particles striking thedeflector 19 with 'a glancing blow and being deflected outwardly into the bag 17. It is also believed that the mass of air which is entrained in the drum is also given a motion of rotation therewith, so that the deflector 19 also gathers masses of air along with the free particles, which air serves to assist in the carriage of the particles exteriorly of the drum. In-this connection, it will be understood that the bag 17, while impervious to the passageof these free particles, will readily permit the pas-- The foregoing arrangement serves very effectively to constantly evacuate free part1- cles, which are usually of-an abraslve nature,

from the interior of the drum, thus preventing their being embedded in the brake strips 18, causing noisy brakes, as well as increasing the wear on the drum. The application of this vstructure to any standard form of brake mechanism does not require any changes in the braking structure, as it is only necessary to-drill a hole in the. cover plate=11 to receive the tube 15.

In Fig. 4 is shown the application of my ilIIlPIOVGClCOllQCiJlIIg means to a brake mechit's contents.

anism which is provided with three shoes.

In this particular arrangement, the disposition of one of the'shoes 21 in the lower portion of the drum 10 prevents the location of the collecting structure in the lower portion ofsaid drum, but a very effective solution can i In Fig. 3 is shown a novel method of ar-- ranging the external end of the tube 15. This modification contemplates the elimination of the bag 17 which obviously mustbe removed from time to time in order to clear particular tormis to provide aflange 22 on the outer end of the tube 15 and to pivotally mount on the upper side thereof a cover in the form of a flap valve 23. This valve is normally maintainedin the slightly open position shown in Fig. 8 by means or a spring 24 which is coiled around the pin 25 which serves to pivotally support said valve, one arm of the'spr'ing engaging with a hook 26 on thevalve 23 and the other arm of said spring being-bent around the back of the flange 22. In the normally opened position "of the valve 23,vthe deflector plate 19 may gather the free particles within the drum for discharge outwardly thereof in the normal operation of the device, but the valve 23 will instantly close against anyiorm of external ressure, such as when the wheel carrying the brake drum may become mired, and

therefore will prevent entrance of mud and sand into the interior of the drum.-

While I have shown one set of elements andcombinations thereof for effectuating my improved dust'collecting device for enclosed brush, it will be understood that the same is ntended for purpose of illustration only and lll ilOwlse to restrict my arrangement to the precise forms and structures shown, for many changes may be made therein without departing from thespirit of v my invention.

I claim: 1

1. The combination with a brake of the inclosed type having a rotatable drumand a fixed cover plate therefor, of means projecting within said drum, said means bearing lightly against the flange'of said drum and acting subs'tantially-as a scoop for collecting and dlschargmg free particles externally of the brake.

-2. The combination witha brake of the inclosed type having a rotatable drum and a fixed coverp'late therefor, of means pro-, jecting within said drum, the portion of said means within said drum having substantial lya spiral cross section with the-free end identical with that above de- The solution proposed in this its thereof bearing lightly against the flange of said drum and acting substantially as a scoop for collecting and discharging free particles externally of the brake.

3. The combination of a brake of the inclosed type having a'rotatable drum-and a fixed cover plate therefor, of means projecting within said drum, said means bearing lightly against the flange of said drum and acting'substantially as a scoop for collecting and discharging free articles externally of the brake, the axis oi said means being angularly disposed to the axis of the drum( 4. The combination with a brake of the inclosed type having a rotatable drum and a fixed cover plate therefor, of means projecting within said driun, said means bearing lightly against the flange of said drum and acting substantially as a scoop for collecting and discharging free particles externally of the brake, the axis of said means making substantially an obtuse angle with the direction of movementof the drum flange in the region of said flange which is contacted by said means. 7

5. The combination with a brake of the inclosed type, of means projectingv Within the interior of the brake and adapted to collect free particles for discharge externally of the brake, and means for preventing ingress of particles into the brake from the outside through said means.

6. The combination with a brake of the inclosed type having a rotatable drum and a fixed cover plate therefor,'of means projecting within said drum, said means bearing lightly against the flange of said drum .collect free particles for discharge exter prevent ingress of acting substantially as a scoop for collcct-- ing and discharging free particles externally of the brake, and a detachable receptaclemounted on the-external end of said v i w I v F0 s. The combination with a brake. of the collecting means.

inclosed type, of means projecting within the interior of the brake, said means bear-i ing lightly against the brake drum and act- 1 ing substantially as a scoop forcollecting and discharging free particles-externallyof the brake. a a g a 9. The combination with a-brake of the inclosed type, of means projecting within the interior of the brake and adapted to collect free particles for discharge externally of thebrake, and a detachable receptacle mounted on the external end of said collecting means. j 10. The combination with inclosed type, of means projecting within a brake oflthe K the interior of the brake andadapted to'collect free particles for discharge externally of the brake, and a bag detachably mounted f n i on the external endof said'collecting means.

11. The combination with a brake of the inclosed type, of means projecting within the interior, of the brake and adapted to nally of the brake, conduit means connecting said collecting means with the atmosphere,

and outwardly opening, check valve means located on the end of said conduit means to permit discharge of said particles andto valve means. 1 e 12. The combination with a brake of the jecting within said drum, the portion of said means within said drum having substantially a spiral cross-section". with the free endth'ereof bearing lightly against the as a "scoop for collecting and discharging free particles externally of the brake, the y axis of said means being angularly' disposed to the axis of theldrum.

* FRANK E. PAYNE;

particles through said inclosed type havingarotatable drum anda a fixed cover plate therefor, of means pro- 1 flange of said drum and acting substantially a 

